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发明名称
WELL SERVICING SYSTEM
摘要
申请公布号
GB2214954(B)
申请公布日期
1991.08.07
申请号
GB19880025493
申请日期
1988.11.01
申请人
* OTIS ENGINEERING CORPORATION
发明人
KWOK-PING * WONG;PETER * COWAN
分类号
E21B29/04;E21B29/08;E21B33/038;E21B33/076;E21B34/04
主分类号
E21B29/04
代理机构
代理人
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